Device for sharpening diamond ore-drills.



PATENTED DEC. 12, 1905.

C. BAMBERG.

DEVICE FOR SHARPENING DIAMOND ORE DRILLS.

- UNITED STATES PATENT orrion- OHARLES BAMBERG, OF ASPEN, COLORADO, ASSIGNOR OF ONE-HALF TO JOHN WEBB, OF ASPEN, COLORADO.

DEVICE FOR SHARPENING DIAMOND ORE-DRILLS.

Specification of Letters Patent.

Patented Dec. 12, 1905.

To all whom, it may cmccern:

Be it knownthat 1, CHARLES BAMBERG, a citizen of the United States, residing at Aspen, in the county of Pitkin and State of Colorado, have invented certain'new and useful Improvements in Devices for Sharpening Diamond Ore-Drills and I do hereby declare the an'attachment for an anvil whichcan be read ily a plied thereto for the purpose of being emp oyed in the'process of sharpening the cutting edges of a drill.

Another object of the invention is to provide an attachment for an anvil which will permit of the drill to be retained in approximately a horizontal plane while the cutting edges thereof are being resharpened.

A still further object of the invention is to improve the construction of a forming device which is adapted to be ositioned upon an anvil to be employed in t e widening of the cutting-surfaces ofthe rock-drill and which can be easily removed from said anvil and transported without difiiculty.

Among these objects I also contemplate the construction of a device which is to be employed in the shar ening of drills which is both simple and dura le in construction and constructed of a minimum number of parts.

With these and otherobjects in view the invention consists in certain other novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the claim hereto appended.

In the drawings, Figure 1 is a view in side elevation of a device constructed in accordance with the present invention, mounted upon an anvil, and a fragmentary view of a drill mounted within said device. Fig. 2 is a perspective view of a forming device constructed similarly to that shown in Fig. 1.-

The device constructed in accordance with the present invention is adapted to be employed to forge from new material the cutting edges of a drill l of the ordinary type or, if desired, to renew said cutting edges. When it is desired to widen the cutting edges of a drill for the clearance of the same, the wings 2 must be upset while hot at the end that is to be'provlded with cutting edges, and in order to hold the drill in position so that it may undergo the upsetting and edge-forming operation it will be necessary for the operator to retain the drill 1 in a horizontalposition and place the edge of the wings 2 in such a position with the forming device as will be hereinafter sp ecifioally described. The sharpening device or die preferably comprises in its construction a rectangular body 3, which is provided with a longitudinal groove 4, extending throughout the entire length thereof. The forming of groove 4 upon the body portion 3 necessarily produces a pair of extensions 5 5, which are provided with flat upper surfaces 6 6, which are normally engaged by one side of two of the wings 2 of the drill 1 whensaid drill is laced thereon. One of the wings 2 of a drill will extend into groove or way 4 and be entirely surrounded by the walls, which are formed by the extensions 5 5 of. body portion 3, produced by the formation of way or groove 4. Upon the forward end 7 of body portion 3 and integral with each of the extensions or sides 5 5 there is formed a substantially segmental lug 8,which is rovided with an angular surface 9 and wit a beveled surface 10. The body portion of the forming device is adapted to be positioned, bymeans of an integral extension, within a recess 12, formed in an anvil 13. The extension 11 is integrally secured to the lower portion of body 3, and in shape it is preferably rectangular, although other constructions may be employed. Owing to the rectangular construction of extension 11, the forming device is retained in comparatively a fixed assembled position with anvil 13.

When it is desired to form an edge upon or widen the cutting edges of the Win s of the drill, it will be necessary to place t e outer edge of the drill upon the beveled surface 10, as illustrated in Fig. 1, the lower edge of the wings 2, which are shown in Fig. 1 as being in engagement With the flat edges 6, not being ositioned so as to enga e said edges 6, but being removed, so as to p ace the ed e 14 of the wings in approximately a centra position upon the beveled edge 10 and by hammering upon the up er edge 15 of the win s the edge will be wi ened, and consequent y sharpened. By this operation it will be obvious that owing to the construction of the forming device it will be unnecessary to position the drill at an angle to a horizontal plane, as is ordinarily the case with sharpening the Win s of a drill upon an anvil or by employing t e means for such purpose as is known to the patented art. It is unnecessary to elevate the steel drill in order to sharpen the same, as it can be done by retaining said drill in a horizontal position, and thereby minimizing the expense and labor necessary for their operation. The peculiar construction of the beveled lugs and the body portion of the device also produces a drill having a uniform sharpened edge when the operation is completed. The sharpening is accomplished entirely upon an anvil with an ordinary and also with set hammers. In sharpening an ordinary drill it has been necessary to elevate the steel about forty-five degrees, and thereby making it impossible to obtain a uniform drill.

By forming the lugs 8 with faces 9 which incline downward from the working faces 10 of the lugs they do not interfere w1th or obstruct the action of a hammer when the same is brought downward on the beveled end of the drill being sharpened. This will be plainly understood by referring to Fig. 1, where the beveled face of'the drill is practically in alinement with the receding face 9 of the lug 8. By extending groove 4 from one end to the other of the body of the device said groove can be readily cleaned of any mate-- rial which may accumulate therein, and should the lugs 8 or any other portions of the device be spread laterally through constant hammering the inner or adjoiningfaces of the lugs and the Walls of the groove can be easily dressed by reci rocatin a file or otherresult maybe obtained if a device is employed embodying the same principle, but deviating from some of the minor details of construction depicted in the drawings and described in the foregoing specification, and for this reason I reserve the right to make such alterations, modifications, and changes as shall fairly fall within the spirit and scope of the present invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is'

A device of the character described comprising a body portion having a longitudinal groove extending throughout its len th, and lugs projecting from one end of the ody at opposite sides of the groove, said lugs having beveled Working faces and having their outer faces receding from said working faces.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES BALIBERG.

Witnesses:

F. J. EBLER, F. PFLUM. 

